diff --git a/c_tools/libzobov/loadZobov.cpp b/c_tools/libzobov/loadZobov.cpp
index a1a6cbb..e34ef45 100644
--- a/c_tools/libzobov/loadZobov.cpp
+++ b/c_tools/libzobov/loadZobov.cpp
@@ -134,11 +134,15 @@ bool loadZobov(const char *descName, const char *adjName, const char *voidsName,
     }
 
   cout << "Loading description" << endl;
+  int lineid = 1;
 
   string line;
   getline(descFile, line);
+  lineid++;
   getline(descFile, line);
+  lineid++;
   getline(descFile, line);
+  lineid++;
   while (!descFile.eof())
     {
       istringstream lineStream(line.c_str());
@@ -160,7 +164,7 @@ bool loadZobov(const char *descName, const char *adjName, const char *voidsName,
 	   >> probability;
       if (!lineStream)
 	{
-	  cerr << "Error in text stream" << endl;
+	  cerr << "Error in text stream at line " << lineid << endl;
 	  abort();
 	}
       
@@ -187,6 +191,7 @@ bool loadZobov(const char *descName, const char *adjName, const char *voidsName,
 	       << actualNumber << ")" << endl;
 	}
       getline(descFile, line);
+      lineid++;
     }
 
   cout << "Done loading" << endl;